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Security Bulletin: This Power System update is being released to address CVE-2021-20487

Security Bulletin


Summary

Power9: A new Power Systems firmware update is being released to address Common Vulnerabilities and Exposures issue number CVE-2021-20487. The Self Boot Engine(SBE) can be compromised from the service processor to allow injection of malicious code. An attacker that gains root access to the service processor could compromise the integrity of the host firmware and bypass the host firmware signature verification process. This compromised state can not be detected through TPM attestation.

Vulnerability Details

CVEID:   CVE-2021-20487
DESCRIPTION:   IBM Power9 Self Boot Engine(SBE) could allow a privileged user to inject malicious code and compromise the integrity of the host firmware bypassing the host firmware signature verification process.
CVSS Base score: 8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/197730 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
OPENBMCOP940
Server FirmwareFW930
Server FirmwareFW941
Server FirmwareFW940

Remediation/Fixes

Customers with the products below, install FW930.30 or later if using FW930.XX. Install FW940.20 or later if using FW940.XX.  Or install FW950.00 or later.

1) IBM Power Systems S922 (9009-22A)
2) IBM Power Systems H922 (9223-22H)
3) IBM Power Systems S914 (9009-41A)
4) IBM Power Systems S924 (9009-42A)
5) IBM Power Systems H924 (9223-42H)
6) IBM Power Systems L922 (9008-22L)
7) IBM Power Systems E950 (9040-MR9)
8) IBM Power Systems E980 (9080-M9S)

Customers with the products below, install  FW950.00 or later

1) IBM Power Systems S922 (9009-22G)
2) IBM Power Systems S914 (9009-41G)
3) IBM Power Systems S924 (9009-42G)
4) IBM Power Systems H922 (9223-22S)
5) IBM Power Systems H924 (9223-42S)

Customers with the products below, install OP940.20 or later

1) IBM Power Systems AC922 (8335-GTH)
2) IBM Power Systems AC922 (8335-GTX)
3) IBM Power Systems IC922 (9183-22X)


Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Change History

29 Apr 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location

Worldwide

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Document Information

Modified date:
25 May 2021

UID

ibm16455911